Heat Advisory 2, NWS Nashville, TN

Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Giles County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Perry County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Wayne County, TN, Williamson County, TN, Wilson County, TN

Area Forecast Discussion
National Weather Service Nashville TN
1222 PM CDT Thu Jul 18 2019

.UPDATE...
FOR 18Z AVIATION DISCUSSION.

&&

.DISCUSSION...

Made a few modifications to the temps and PoP in the short term to
better align with the latest obs. Cloud coverage this morning has
limited heating across the area, keeping temps a bit cooler than
originally expected. Still expecting highs to reach into the mid 80s
to low 90s this afternoon with dewpoint temps in the low to mid 70s.
A Heat Advisory will begin at noon and last through 7 PM tonight as
Heat Indicies could reach 105 in some areas. Afternoon Heat Indicies
will be greatly dependent on our areal thunderstorm coverage this
afternoon as we do expect isolated to scattered PoP through most of
the afternoon and early evening. Shower/t'storm coverage would
likely keep temps a bit lower this afternoon, so some relief from
the heat is possible. This morning's sounding did reveal a PWAT
value of 1.70 inches, so if a thunderstorm were to linger over an
area this afternoon, localized flooding could become an issue.
Otherwise just expecting general showers and thunderstorms this
afternoon.

Tomorrow and Saturday still appear to be some of the hotter days
we've seen a while with Heat Indicies likely climbing near to over
105 both days. Will continue to monitor this and discuss further in
the full afternoon package later today. Other than that, the rest of
the forecast appears to be on track.

&&

.AVIATION...
18Z TAF DISCUSSION.

Scattered TSRA will form across the area this afternoon, so VCTS
included at all sites. Tempo TSRA also included for CSV where
coverage is already increasing. Main concern with TSRA is
localized heavy rainfall. Winds will come from the WSW 6-10KT this
afternoon. TSRA will diminish around 00Z with mainly VFR after.
Some patches of late night fog/stratus possible, but confidence
too low to include in tafs attm.

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for Bedford-Cheatham-
Davidson-Dickson-Giles-Hickman-Houston-Humphreys-Lawrence-Lewis-
Macon-Marshall-Maury-Montgomery-Perry-Robertson-Rutherford-Smith-
Stewart-Sumner-Trousdale-Wayne-Williamson-Wilson.

&&

DISCUSSION......MacDonald
AVIATION........13

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